Forging-press.



T. F. BAILY. FORGING PRESS. APPLICATION FILED SEPT. 20, 1909.

Patented Apr. 19, 1910.

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WW 2% wmv WM e M 0 Wm claw T. P. BAILY. FORGING PRESS. APPLICATION FILED SEPT. 30, 1909.

955,122. Patented Apr. 19, 1910.

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T. P. BAILY.

FORGING PRESS. APPLICATION FILED SEPT. 30, 1909.

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T. P. BAILY. FORGIN G PRESS. APPLICATION FILED SEPT. 30, 1909.

Patented Apr. 19, 1910.

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@nwnkoz witnmu aowsam 5" ig. A I MM mummy THADDEUS F. BAILY, F ALLIANCE, OHIO.

i'sORGING-PRESS.

Specification of Letters Patent. Application filed September 30,1909.

Patented Apr. 19, 1910. Serial No. 520,301.

To-aZZ whom it may concern:

Be it known that I, THADDEUsF. BAILY, a citizen of the United States, residing at Alliance, in the county of Stark and State of Ohio, have invented a new and useful Forging-Press, of which the following is a specification.

' My invention relates to devices used in the forging of metals and has special refer- .Wence to a device whereby a suitable ram may be brought into engagement with said metal, with or without a considerable force or blow, and a further pressing action of said ram produced by hydraulic action to effect a pressing or squeezing of the said metal, which eiiect is desirable in producing forgings of various kinds as is well known to those skilled in the art.

The form of device herein described in cludes electric and hydraulic means for producing the movements of the ram as hereinafter more fully will appear.

The objects of my invention are to generally improve forging presses, to provide a device of'the character mentioned which will be simple in construction, readily controlled, relatively rapid in operation and thoroughly eificient. These objects, together with other objects readily apparent to those skilled in the art, I attain by the construction illustrated in the accompanying drawings, in which Figure 1 is a vertical section through a forging press embodying my improvement, portions being broken away and portions of the controlling mechanism and immediately related devices being shown partly in elevation and partly in section to more fully disclose the construction. Fig. 2 is a vertical sectional view taken on a plane transverse to the plane of Fig. 1 and showing the primary and secondary windings of the electrical portion of the device, portions of the device being broken away view. Fi L3 is a view taken on the same plane-as 1 but showing parts of the device in diiferent relative position from that shown in Fig. 1. 'Fig. at illustrates a modified form of construction. Throughout the several views similar nu merals 0 reference indicate similar parts.

In the construction of a forging press in accordance with my invention a suitable base or foundation 1 should be provided and upon this base is arranged in any desired mechanical manner the anvil 2 upon which to simplify the V the metal to be forged is intended to be placed. Mounted upon the base 1 and connected thereto on both sides of the anvil are the vertical lower frame pieces 3 and 4:, the inner sides of which are arranged in arallel relation to each other and provided with the vertical parallel grooves and ridges 5 adapted to guide the ram in the manner hereinafter more fully described. Formed integrally with the frame pieces 3 and 4 are the upper arms 6 and 7 and the lower arms 8 and 9. The purpose of the said arms is to support the laminated pole pieces 10 and 11 upon which the primary coils are arranged. Each pole piece consists of a built up or laminated structure, each of the laminations bein preferably stamped from sheet metal and of the form illustrated in Fig. 2. When completed each pole piece presents an inner, flat, vertically disposed face in which are cut transverse grooves vertically spaced from each other and adapted to receive the primary windings. The pole pieces are connected to the arms by suitable means such as the supporting bolts 12, one of such bolts extending from one arm 6 to the other arm 6 and from one arm 8 to the other arm 8 respectivelyand supporting the pole piece 10, and similar bolts extending between the arms 7 and 9 to support the pole-piece 11.

The construction of the electrical portion of the present device is analogous to my heretofore patented construction illustrated and described in United States Letters Patent No. 930,022 and in carrying out the construction I arrange in each transverse groove in the pole pieces a primary coil 13, each coil being separately prepared, slipped into its appropriate groove and secured in any suitable manner. The coils so arranged constitute two parallel, vertically disposed series arranged opposite each other and of similar construction. Connections 14 are arranged to connect the variouscoils, while at the upper end of each series of coils is 'an appropriate resistance inter-connection 15 arranged in the manner common in induc tion motor construction. The conductors 16, 17 and 18 suitably connect with the coils;

of the pole pieces in accordance with induction motor construction. The pole pieces, coils and connections having been arranged as described and the conductors 16, 17 and 18 properly connected witha suitable source of alternating current, it Wlll be understood that a traveling magnetic field willoe produced adjacent the two vertical series of coils in the pole pieces.

The ram consists of the head portion 19v of which the hammer or die 20 forms a part and of theintegral, spaced, upwardly extending side flanges 21 to which, as also to the head 19 are connected suitable grooves and ridges adapted to engage the grooves and ridges 5 in the lower frame pieces 3 and 4 hereinbefore described. Preferably formed integrally with the head portion 19 is the plunger 22 which is provided at its upper end with an extended cylinder portion 23 preferably of considerably reduced diameter with respectto the diameter of the plunger 22. The cylinder portion 23 is provided, ad-

' jacent the upper' extremity of the plunger,

with apertures 24 affording communication with the interior of said cylinder portion. The interior of said cylinder portion is provided with a true bore adapted for the reception of an auxiliary plunger 25 hereinafter more fully described. Arranged between the side flanges 21 on both sides of the lower portion of the plunger 22 are built up or laminated structures 26 which project slightly beyond the edges of said flanges and are provided in the said projecting portions w1th transverse grooves in which copper bars 27 are arranged to constitute the secondary winding. It should be understood that the laminated structures are properly attached to the ram by suitable means such as the bolts or pins 28 extending from flange to flange of the ram. It should also be under stood that the copper bars 27 should be provided at their ends with appropriate electrical inter-connection, (not shown) to properly constitute a secondary winding in accordance with induction motor construction, the laminated structures together with said bars constituting a short circuited secondary. -When constructed the ram shouldbe arranged between the vertical frame pieces 3 and 4, with the grooves and ridges on said ram in vertical slidable engagement with the groovesand ridges 5, and the bars 27 located adjacent the vertically disposed pole pieces 10' and 11. It will thus be seen that the two pole pieces and the two short circuited secondaries constitute two electromagnetic motive elements adapted to cooperate in producing vertical movement of the ram.

Mounted upon the lower frame pieces and extending between the same is the plunger cylinder 29 which is provided with a true internal bore 30 vertically disposed, opening downwardly and provided at its lower extremitywith a packing device or stufling box 31 ada ted to permit the plunger 22 to move vertica ly therein without "the leakage of water from the interior of said cylinder. At the upper end of the. cylinder 29 and arranged centrally with reference to the bore 30 is an aperture provided with a suitable stufling box 32 through which the cylinder portion of the plunger 22 is adapted to extend, and permitting said cylinder portion to move vertically in and out of the cylinder 29 without the leakage of water from the interior of said cylinder. It should be noted that the upper end of the plunger 22 is provided with packing rings 33 closely fitting the bore 30 as well understood in the art.

From the upper end of the bore 30 the passage 34- leads through the wall of the cylinder 29 and communicates with the pipe 35. Said pipe 35 communicates with the water controlling valve 36, to be hereinafter more fully described and from which valve the pipe 37 leads to the storage tank 38 with the lower portion of which it makes'connection.

Said tank is of sufliciently strong construc-' tion to be capable of with-standing internal water and air pressure. Said tank may be supported in any suitable manner, the drawing disclosing a bracket 39 connected to a suitable supporting wall 39 Arranged above the plunger cylinder 29 and preferablysupported by the frame pieces 3 and 4 and said plunger cylinder are upper frame pieces. These frame pieces are provided with integral spaced leg portions 40 and 41 adapted to support t e upper portions of said frame pieces 42 and 43 respectively. The inner sides of said upper portions of the upper frame pieces are arranged in parallel relation to each other and provided with vertical parallel grooves and ridges 44 analogous to the grooves and ridges 5 on the lower frame pieces. Formed integrally with the portions 42 and 43 are the arms 45 to which are connected the spaced, laminated upper pole pieces 46 and 47 by means of bolts 48 or their equivalents. The pole pieces 46 and 47 are constructed substantially in the same manner the pole pieces 10 and 11 and are provided with analogous series of vertically spaced coils wound and connected in accordance with induction motor construction and each pole piece presenting an inner, flat, vertically disposed face. The conductors 49, 50 and 51 connect with the coils of the pole pieces 46 and 47 in accordance with the princi les of induction motor construction. It wil thus be understood that the pole pieces 46 and 47 constitute a pair of primaries and that when an alternating current is supplied to the conductors 49, 50 and 51 a traveling magnetic field will be produced adj acentthe two built up or laminated structures 53, the outer surfaces-of which are adapted to lie closely adjacent the coils of the pole pieces 46 and 47. The structures 53 are provided with suitable copper bars 54 let into grooves in said structures and constituting secondary windings. Suitable electrical. connection is made between the various bars in each structure, (such connectionmot being shown in the drawing) in accordance with the well known principles of the winding of secondaries in induction motor construction. The laminated structures 53 are attached to the head 52 by the pins 55 or their equiva lents. The head 52 is connected to the auxiliary plunger 25 and any vertical movement of said head will produce corresponding movement of said plunger. It will thus be seen that the auxiliary plunger head and the surrounding construction resemble the ram and surrounding construction in the lower portion of'the device and it will be understood that by proper control and manipulation of the current supplied to the conductors 49, 50 and 51 the magnetic field adjacent the coils in the pole pieces 46 and 47 may be caused to move upwardly or downwardly through the series of coils in the primary windings and thus control the vertical movement of the auxiliary plunger head 52 and the plunger 25. At the lower end of said plunger are arranged the packing rings 56 adapted to pack said plunger so as to closely engage the walls of the cylinder portion 23.

It will thus be understood that by the appropriate manipulation and control of the current supplied to the conductors 16, 17 and 18 the ram including the head portion 19, hammer or die20, plunger 22and connected portions may be raised and lowered at the will of the operator.

The water controlling valve 36 is provided with a bore 57 within which are adapted to slide the spaced pistons 58 and 59 connected to the valve rod 60. It will be understood that the piston 58 may be moved into position illustrated in Fig. 3 to shut off communication between the pipes 35 and 37 and that the pistons may be adjusted to the position illustrated in Fig. 1 so that communication between said pipes 35,, and 37 is established. The valve rod 60 is slidably mounted inthebrackets 61 and 62 which are adapted to maintain said rod in proper position during its longitudinal movements hereinafter to bedescribed. It should be stated that the said rod 60, together with the pistons 58 and 59 constitute sufiicient weight to cause the said rod and pistons to normally assume their lowermost position Mounted upon the lower frame piece 3 is a circuit breaker 63. Such circuit breaker is of the ordinary construction, which 06nstruction is well known to those skilled in .the art; The details of construction of such circuit breaker are not claimed in the present application and are therefore not herein described. It is well understood that the purpose of such circuit breaker is to break the circuit in case of over load and as is well known the circuit breaker is provided with a lever or handle '64 which is thrown upon its pivotal point with considerable force in breaking the circuit. The purpose of the circuit breaker in the present construction is to break the circuit at such time as the ram has descended and engaged the metal to be forged and has come to rest by reason of the mechanical resistanceofi'ered by said work. In the construction herein disclosed the circuit breaker should be so disposed that when the circuit is broken the lever 64 will be thrown upwardly or in other words thrown from the position illustrated in Fig. 1 to the position illustrated in Fig. 3. The lower end of the valve rod 60 is provided with a lug 65 adapted to engage the lever 64 and to rest thereon, the said rod 60 being thus adapted to be raised by the upward movement of the lever 64, the circuit breaker being provided with a sufficiently heavy lever operating sprin or weight to actuate the rod 60 together wlth its connected'parts as described.

Mounted & upon an extension 66 of the lower frame piece 3 and pivotally connected thereto at the point 67 is themain controlling lever 68. Said lever is provided with the right angled portion 69 the outer end of which is adapted to be raised and lowered by the pivotal movement of said lever about the point 67. Pivotally connected to the outer end of the portion 69 is the lever rod 70 which is slidably mounted in the bracket 1 71, which bracket is attached to the frame piece 3 in any mechanical manner. The lever rod 70 is provided at its upper end with a cross head 72 from: one end of which extends the portion 73 provided with a vertically elongated opening 74 through which opening the lever 64' extends. At the other end of said cross head the rod 75 is pivotally connected the other end of the rod" 75 being pivotally connected at the' point 76 to one end of the switch lever 77 Said switch lever 77 is'pivoted at the point 7 8 to a suitable support such as the bracket 7 9. The end of the lever 77 opposite the point is provided with three switch or contact points connected to the conductors 79', 80 and 81 respectively, which conductors lead to and .make appropriate connection with the circuit breaker 63. The points or contacts to which the conductors7 9, 80 and 81 are connected as just described are adapted to move so as" to contact with the upper three or the lower three of the four contact. points 82 to which are connected the conductors 83,, 84 and 85. Said conductors 83, 84 and 85 being supplied with an appropriate alternating current it will be understood that by the adjustment of the lever 77 the said current will be caused to flow throu h the conductors 79, 80 and 81 in one the lever 77 is in its upward position and in the reversed direction when said lever is in its lower position. 17 and 18 are suitably connected to the circuit breaker 63 and it will thus be understood that the conductors 79, 80 and 81 are adapted to supply current to the primary 0011s 13 of the lower ole pieces 10 and 11 through the said circuit reaker 63, which circuit breaker will thus control the current supplied to said-coils 13 and break the circuit at the proper point of overload.

I The switch lever 86 is pivotally mounted at the point 87 upon a suitable stationary support, as the bracket 88 and is provided with three switch or contact pointsiconhected to the conductors 49, 50 and 51 respectively, which wires lead to and make appropriate connection with the coils in the upper pole pieces as hereinbefore described. Suitably disposed upon thebracket 88 are four contact points to which are connected the conductors 83, 84 29116185. in such wise that when the three switch or contact points of the lever 86 are thrown into contact with the lower three of said four contactpoints the current will pass in one direction through the conductors 49, 50 and 51, whereas the said current will be reversed when the three contact points of the lever 86 are moved, by the pivotal adjustment of said lever, to register with the upper three of thesaid four stationary contact points. Arranged upon the end of the lever 86 opposite the three contact points, is a weight 89 which is adapted to normally hold that end of the lever down and maintain the three contact points of said lever in contact with the upper three of the four stationary contact points.

. Pivotally attached to the outer end of said lever 86 beyond the weight 89 is the connecting arm 90, the lower end of which is provided with a vertically disposed aperture through which the valve rod 60 extends and within which said rod is vertically slidable. Upon the bracket 88 is arranged the stop lug 91 adapted to prevent the weight 89 from drawing the lever 86 downwardly beyond the point illustrated in Fig. 1. Ar-

ranged upon the valve rod '60 is the arm lifting lug 92 which is adapted, when the rod is raised vertically to a suflicient height, to engage the arm 90 and raise said arm upwardly, against the normal action of the weight 89, and thus adjust the lever 86 upon its pivotal point *to bring the contact points of said lever into the position-illustrated in Fig. 3 in contact with the three lower stationary contact points of the conductors 83, 84 and 85. 1

The numeral 93 designates a generator of irection when The conductors 16,

alternating current suitable for the operation of the herein described device and ductors 83 and 94, 84 and 95 and 85 and 96 simultaneously. The details of construction of such switch are not herein claimed and any suitable electrical contrivance for making and breaking the circuit from the generator to the conductors 83, 84 and 85 may be employed. It is desirable, however, that the said switch 97 be so constructed that it may be operated from a distance, and preferably by the same operator who manipulates the main controlling lever 68. In the drawings I have somewhat conventionally illustrated a device for so operating the switch 97, which device consists of an arm 98 fixedly attached to the movable portion of said switch and to which arm the connecting rod 99 is pivotally attached. The rod 99 extends downwardly and is slidably mounted within a suitable stationary bracket 100 adapted to keep said rod in place while permitting vertical movement thereof. At the lower end of the rod 99 is arranged a stirrup or foot piece 101 which is adapted to receive the foot of the operator to move the rod 99 upwardly or downwardly as desired. The spring 102 is also provided, which spring is attached at its upper end to the rod 99 and rests upon the bracket 10 0, and is so arranged as to normally hold the rod 99 in the upper position illustratedin Fig. 1, in which position the switch 97 is open. The operator may then place his foot within the stirrup 101 and draw the rod 99 downwardly against the action of the spring 102, thus trated in Fig. 1 with the hammer 20 resting upon the anvil 2, the plunger 22 being at its lowest point and the auxiliary lunger head 52-with the plun er 25 at thelr lowest respective oints o adjustment. The operator placlng his foot in the stirrup 101 and grasping the main controllin lever 68 presses downwardly with his oot, closing the switch 97 and causing the current from the generator 93 to pass through the con ductors 83, 84 and 85 to'the conductors 49, 50 and 51 and the conductors 79, 80 and 81.

The current passing through the conductors 49, 50 and 51 will immediately raise the auxiliary plunger head 52 and the plunger 25 to their extreme upper position illustrated in Fig. 2 while the current passingthrough the conductors 79,- 80 and 81 and through the circuit breaker 63' .to the conductors 16, 17 and 18 will cause the ram together with the hammer 20 and theplunger 22 to be raised 4 is brought into the position illustrated in :the interior of the cylinder portion 23 into the position illustrated in Fig. .2. It will be understood that the tank 38, the pipe '35, the valve 36, the

ipe 37, the plunger cylinder .29 and the cy inderportion 23 are filled with water, with the exception of the tank 38, which is not completely full. As the electric current raises the ram and auxiliary plunger head, thus raising the plunger 22 the water controlling valve is in the adjustment illustrated in Fig. 1, thus permitting the water forced from the cylinder 29 to escape into the tank 38, where it will be held under considerable pressure by reason ofv the compression of the air above the water in said tank. When it is desired to bring thehammer 20 down upon the work 103 upon the anvil 2 the controlling lever 68 Fig. 3, thus raising the lever rod 7 0 and the portion 73 connected thereto and bringing the opening in said portion 73 upwardly so as to permit the lever 64 of the circuit breaker to rise at a point of time slightly later in the operation as shortly to be described. The upward movement of the le-- ver rod 70 will throw the switch. lever 7 7 so as to reverse the current supplied through the circuit breaker 63 to the coils in the lower pole piece, thus bringing the ram downward u on the work and at the same time lowerir the plunger 22 in the cylinder 29 to the position illustrated in Fig. 3 and drawing water from the tank 38 into the upper portion of the cylinder 29 and into through the apertures 24. The water being under pressure in the tank 38 will very readily flow into the said cylinderv and cylinder portion through the valve 36 in a rapid manner. The hammer 20 having come into engagement with the work 103 is brought to rest thereupon and the current continuing to flow through the circuit breaker 63 will operate said circuit breaker, thus drawing the lever 64 upwardly into the position illustrated in Fig. 3, which movement will raise "the valve rod 60 into the position illustrated in Fig.3, closing the passage way through the valve 36 by the piston 58, bring the lug 92 into engagement with the arm 90, and

,, actuating the switch lever 86 to bring it into .the

position illustrated in Fig. 3, thus reversing the current supplied to the conductors 49, 50 and 51 and thus bringing the auxiliary plunger head 52 downwardly with great power, carrying with it the auxiliary plunger 25, which lunger will force the water from the interior of the cylinder port1on 23 through the apertures 24 into the interior of the plunger cylinder 29 and producing additional hydraulic pressure within said cylinder 29, tending to move the Plum ger 22 downwardly with great force and causing a pressing action of the ram and. hammer or die 20' upon the work 103.

.the position illustrated in Fig. 1, whereupon 'the auxiliary head and ram will be again raised to their uppermost positions and the" lever rod 70, the lever 64, the pistons 58 and 59 and the switch levers 77 and 86 returned to their initial positions by the same movement of the said lever.

The construction illustrated in Fig. 4 is a modified form of the device in which the cylinder portion 23 and auxiliary plunger 25 with the related parts and electrical operative portions are not employed, a pump and motor operated by the current supplied to the conductors 83, 84 and 85 being used. In said Fig. 4 the numeral 104 indicates a pump capable of producing considerable hydraulic pressure in a short space of time and operated by the motor 105, which motor may be of any desired form adapted to be operated by the current supplied through the conductors 83, 84 and 85 and preferably capable of rapid starting. The details of construction of the motor and pump are not claimed herein and will therefore not be described. It should be stated, however, that the said pump 104 is connected by means of the pipe 106 with the interior of the cylinder 29. In the drawings the pipe 106 is shown as connected to the water controlling valve 36 intermediate said valve and the v cylinder 29, thus providing communication with the interior of the cyllnder 29 through the pipe 35 and passage 34. The switch 107 is adapted toconnect the conductors 83, 84 and 85 with the conductors 108, 109 and 110 and is supported upon a suitable bracket 111. The said switch is provided with the lever portion 112 which is prevented from assuming a position lower than that illustrated in Fig. 4 by means of the stop 113. In such position the switch is open. When it is desired to close the circuit the lever 112 may be raised, throwing the switch upon its pivotal point at 114 as will be readily understood to those skilled in the art. The valve rod 60 is extended a sufiicient distance above the piston 59 so that When said valve headus in its lowest position, as illustrated Fig. 4, the upper end of said valve rodwill be verticallyspaced from the lever 112, said lever being in its lowest position as illustrated in Fig. 4. When the-lever 64 of the circuit breaker 63 rises and moves the-rod 60 to its upper position the upper end of said rod engages the lever 112 and closes the switch 107. When the switch 107 is so closed it will be understood that the valve .head 58 has assumed the position to close the passage through the valve 36, and the current belng supplied to the conductors 108, 109 and 110 will immediately set in motion the motor 105, driving the pump 104 and forcing water through the pipe 106 into the interior of the cylinder 29, thus producing h draulic pressure upon the head of the p unger 22 and resulting in a squeezing or presslng of the ram downwardly, In much the same manner as in the case of the con- .struction illustrated in Figs. 1, 2 and 3. For the purpose of supplying water from the tank 38 to thepump 104 the pipe 115 is provided, which pipe will permit the said pump to draw water from said tank and force the same through the pipe 106 as hereinbefore described, while the 'said water will be later returned through the water controlling valve to the said tank 38 as in the case of the constructions illustrated in Figs. 1, 2 and 3.

It should be understood that it may not always be desirable to use the electrical means for bringing the ram downward into engagement with the work. The weight of said ram together with the plunger 22 and connected parts will be sufficient to lower said ram when there is no lifting magnetic force in operation. The pressure in the tank 38 is also adapted to act in such manner as to lower said ram. If it is not desired to use the current to lower the ram it will be readily understood by those skilled in the art that the ram may be lifted. by the electrical means and lowered either by its own weight or by hydraulic pressure in the tank 38. The squeezing or pressing action being produced after the ram has descended to the work as in other cases.

I claim:

1. In a forging press the combination of a ram, electrical means for actuating'said ram and hydraulic means for actuating said ram.

2. In a forging press the combination of a ram, electrical means for actuating'said ram and auxiliary hydraulic means for actuating said ram.

3. In a forging pressthe combination of a ram, electrical means for actuating said ram, and auxiliary hydraulic means, automatically controlled by said electrical means, said hydraulic means adapted to actuate said ram.

4. In a forging press the combination of a ram, electrical means for actuating said ram, I

and auxiliary, electrically operated hydraulic means, automatically controlled by said first mentioned electrical means, said hydraulic means adapted to actuate said ram. i 5. In a for ing ress, in combination with primaries an a p unger cylinder, a movable ram comprising a secondary and a plun er, said plunger located in said plunger cy inder and slidable therein, said secondary adapted to be actuated by said primaries when current is supplied to said primaries and means for producing hydraulic pressure in said lunger cylinder.

-6. A orgingpress comprising a plurality struction, the coils in the series connected to eonductors of an alternating current, a circuit breaker arranged within the circuit of said conductors for breaking the circuit of the current supplied to said coils, a ram including a hammer and a short circuited secondary, the said ram located between the said parallel series of coils and adapted to be moved in a line parallel with said coils by the traveling magnetic field produced adjacent said coils by the said current, hydraulic means for pressing the said ram downwardly, and means for automatically operatin said hydraulic means in accordance wit the movement of said ram actu ated by the said electric current.

8; A forging press comprising spaced primaries, av ram including a head, a plunger,

an extended cylinder portion, and a short circuited secondary, sald plunger connectedto said head, said cylinder portion extended from the upper end of said plunger, sald parts of said ram being connected together, a plunger cylinder, said plunger located 1n said plunger cylinder and adapted for sl ding movement within the same, said cylInder provided with a head havingan aperture therein, said cylinder portion of said plunger arranged to extend through said aperture and adapted for sliding adjustment therein, an auxiliary plunger arranged in said cylinder portion, said cylinder portion provided with apertures extending into the interior thereof near the upper end of said plunger, means for acuating said auxiliary plunger to produce sliding adjustment of the same within said cylinder portion, said ram adapted to be actuated by said primaries when supplied with current, and said plunger 0 linder and said extended cylinder portion a apted to contain water under pressure, substantially as specified.

have hereunto-subscribed my name in the presence of two wltnesses.

THADDEUS F. BAILY.

120. In testimony that I claim the above, I 

